docs(Common): Clarify inline completion provider is for extensions, not AI assistants

Update the doc comment on `ProvideInlineCompletionItems` in `LanguageFeatureProviderRegistry` to correct the description. The old wording implied this method is for AI coding assistants directly, but it actually serves any extension via the provider registry pattern — with GitHub Copilot, Roo Code, and Continue being prominent consumers.

This improves trait documentation accuracy for implementors in the Mountain and Wind layers.

Author: NikolaRHristov

Source/LanguageFeature/LanguageFeatureProviderRegistry.rs

@@ -292,7 +292,7 @@ pub trait LanguageFeatureProviderRegistry: Environment + Send + Sync {
 	/// Called by the file explorer / SCM tree when rendering resource state.
 	async fn ProvideFileDecoration(&self, ResourceURI:Url) -> Result<Option<Value>, CommonError>;
 
-	/// Provides inline completion items (ghost text) for AI coding assistants
+	/// Provides inline completion items (ghost text) consumed by extensions
 	/// such as GitHub Copilot, Roo Code, and Continue.
 	async fn ProvideInlineCompletionItems(
 		&self,